Headlight.



c. B. HALVORSON, JR. & L. 0. lNGALLS.

HEADUGHT.

APPLICA'HON FILED NOV.Z5.l911- 1,143,539. Patented June 15, 1915.

' 2 SHEETS-SHEET 1- QM I Inventors; Watnessesx an I :1

v v Lloyd Oingalls,

Their fittorneg.

Cromwell A.B.Halvors0n Jr UNITED STATES PATENT OFFICE.

JIQOMWELL A. B. HALVOBSON, JIB 0F SAUGUS, AND LLOYD O. INGALLS, OF LYNN, MASSACHUSETTS, ASSIGNOBS T0 GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

HEADLIGHT.

To all wliom it may concern:

HA yoRsoN', Jrf, a citizen of the United States, residing at gaugus, county of Essex, State of .Massachyusetts, and LLOYD 0. Insane, a citizent o'f the United States, residing at Lynn, coi1nty of Essex, State of Massachusetts, have invented certain new and useful Improthments in Headlights, of which the following is a specification.

Ourinvention has reference to a headlight and particularly, though not necessarily, to. a headlight employing luminous or flaming electrodes, from whichlare evolved solidifiable products'of combustion, which form a deposit when brought into contact with a condensing surface. WVhen such solidifiable products are permitted to come into contact with the operatin mechanism of the headlight,a deposit is f orined thereon, thus interfering with the operationgofsuch mech anism. In our headlight, we overcome this .difliculty by dividing the space inclosed by the casing of the headlight into two separate chambers. In one chamber are located the arcing electrodes, suitable provision being made to conduct the fumes from the headlight. The operating mechanism for the lamp is located in the other chamber and is suitably connected to the electrodes or one of them through the partition between the chambers, which partition prevents the solidifiable products of combustion evolved at the are from coming into contact with 1 the operating mechanism and from being deposited thereon, and as the partition is made from a material having a fairly high permeability it shields the operating mechanism from the intense heat of the arc, and the arc itself from the magnetic influence of the operating magnet.

Our invention also comprises a novel form of casing which permits ready access to both the arc chamber and the chamber in which the operating mechanism is located.

Other novel features'of our invention will appear in the following description and will be particularly pointed out in the claims.

Referring to the drawings, Figure 1 is a erspective view, showing the body of the iieadlight swung away from the back plate, against which it. is normally seated, to afford access to the rear chamber containing the operating mechanism; Fig. 2 is a like view ofthe front door, to which is secured the v Specification of Letters fatent.

Patented June 15, 1915.

' Application filed November 25, 1911. Serial No. 662,451.

lens, swun away from the body of the headlight to a -ord access to the front chamber in which the electrodes are disposed; Fig. 3 is a vertical section, and Fig. 4: is a top plan view of our improved-headlight.

The headlightis carried by a back plate 1 which also, when the headlight is in opcrating condition, closes the rear chamber of the headlight. The back plate 1 is secured to a stationary part 2 of the vehicle by straps 3. The electrodes and the operating mechanism therefor are mounted within a substantially cylindrical casing. 4 hinged to the back plate 1 at 5. The front of the headlight is closed by an annular plate 6 hinged to the casing 4 at 7. This plate may conyeniently be secured in position by a spring-pressed plunger 8, Fig. 3,1which is received in an opening 9 in the casing. The plunger may be withdrawn (and the door lifted .by means of a handle 1 A lens 11 ofany usual construction is secured in the annular ,plate 6. "The headlight is divided into front and rear chambers 12 and 13'by a vertical partition 14, which, if the casing is made by casting, is preferably cast integral therewith. Viewed from above, as shown'in Fig. 4, the two lateral parts li of this parluminous type, that is, in whichthe elec .trodes are made of materials suitable for yielding an are having luminous vapors. The upper, ositive electrode 16 is ormay be formed 0 a bar of a material of such a character that it is but slowly consumed and is, in fact, known in the art as a non-con suming electrode. Copper is suitable for this purpose. This electrode is secured to the partition 14 by a clam 17. The lower electrode 18 is or may be fgrmed of a mag netite mixture. This electrode is carried by an arm 19 secured to a short shaft 20 passing through the partition 14. This shaft is sup orted in position at one end by a boss 21 ormed upon the partition, (see Fig. 1), while its opposite end passes throughand is supported by a strap 22 secured upon the partition 14 in the front chamber 12.

The operating mechanism of the lamp comprises a magnet 23 mounted on a stationary yoke piece 2d. The armature 25 of the magnet is connected to a clutch member 26,

which embraces a rod 27. This rod is guided :is secured to the shaft 20 at the end opposite that to which the arm 19 is secured.

The circuit for the headlight is closed by a plug switch 33, which is connected'to a spring contact as secured on the back plate 1 by a conductor 85. This contact engages, when the body of the headlight is closed against the back plate, a contact 36, which is in turn connected to the operating magnet 23 by a conductor 87. The other terminal of the magnet is connected by a conductor 38 to the upper electrode, therlo'wer electrode being grounded through the casing of the headlight.

' The top of the cylindrical casing 4, above the front chamber 12 is provided with an opening 39 communicating with a chamber to formed on top of the casing a by a wall 41 upstanding from the casin This chamher is covered by a lid 42, which may be hinged at 7 and the cover is provided with a cowl 43 by which the fumes from the chamber 40 escape. The headlight has a bail a l of any usualconstruction and legs and 46 for maintaining the headiight in up right position when it is removed from the Vehicle.

The operation of our headlight follows:When the E23, er rgized, its armature is attracted, thereby l ing the rod 27 and the horizontal arm or e elbow lever 29. The lower end 39 this elbow lever is then moved to the ieift, as iewed The terrupted by the trolley passing over a length of insulation in the trolley wire, in accordance with ordinary practice, or until the circuit is otherwise interrupted and the magnet dei nergized The armature oi the magnet is then released, together with the parts connected thereto, and the lower electrode brought into engagement with the upper electrode, and when the circuit is again closed the cycle of operations is repeated.

i fhat we claim as new and desire to secure by Letters Patent oi the United States, is,

1. in an arc headlight, a partition integral with the casing dividing the headlight into "front and rear chambers, electrodes located in the front chamber, removable means for closing the ends of said chambers, operating mechanism located in the rear chamber, con nections between the operating mechanism and the electrodes, and means for evacuating the fumes evolved from the are from the front chamber.

2. in an arc headlight, a partition dividing the headlight into front and rear chambers, the electrodes being located in one chamber and the operating mechanism therefor in the other, a plate for closingthe rear chamber and provided with. means for supporting the headlight, and a door comprising a lens for closing the front chaml'ier.

In an are headlight, a partition dividing the headlight into front and rear chamhers the electrodes bcin iocated in the front chamber and the operating mechanism. therefor in the rear chamber, a back plate pro vidcd with means secu the same to the 1d i ns for pivctally the b it to he back plate, c

a lens for closing her a iliiiii wtbii i), ENGAZLS,

i Vitnesses:

JOHN A Montana's, din, FRANK fintrfrin,

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